Jesse James Checks into Treatment Facility

With his marriage to Sandra Bullock in crisis and his family's future on the line, Jesse James is seeking professional help, his rep tells PEOPLE exclusively.

"Jesse checked himself into a treatment facility to deal with personal issues," his rep said in a statement. "He realized that this time was crucial to help himself, help his family and help save his marriage."

While the rep did not specify the type of treatment facility, one source confirms he checked in on March 26, and that it was "100 percent his own idea" – and not the result of an ultimatum from Bullock.

A cheating scandal that exploded on March 15 has sent James's nearly five-year marriage to Bullock, 45, into a tailspin with claims that he had affairs with at least four women. Bullock has moved out of the family home and is considering her options, another source says.

Before seeking treatment, James, 40, spent much of the last two weeks sticking to a routine, hanging out with his three kids and dropping them off at school and burying himself at work at West Coast Choppers in Long Beach, Calif.